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Attrs example.
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| // https://gist.github.com/soasme/7ede641156d2a7bee4b8bec2e87c2197 | |
| #include <stdio.h> | |
| #include "attrs.h" | |
| AttrsError CoordinatePrint(AttrsArgs args) { | |
| AttrsRef self = AttrsGetSelf(args); | |
| FILE* f = AttrsGetPtrArg(args, "f", FILE*); // Or, FILE* f = (FILE*) AttrsGetPtr (AttrsGetArg(args, "f")); | |
| int x = AttrsGetInt(self, "x"); // Or, int x = AttrsGetInt(args, "self.x"); | |
| int y = AttrsGetInt(self, "y"); // Or, int x = AttrsGetInt(args, "self.y"); | |
| fprintf(f, "Coordinate(%u,%u)", x, y); | |
| } | |
| int main(int argc, char* argv[]) { | |
| // call before any Attrs function. | |
| AttrsInit(); | |
| // make a class | |
| AttrsNewClass("Coordinate", | |
| "x = type: int, default: 0;" | |
| "y = type: int, default: 0;" | |
| "r = type: int, default: 1, private: true;" | |
| "o = type: Coordinate, private: true;" | |
| "def Print(f: File);" | |
| ) | |
| // bind method | |
| AttrsDef("Coordinate:Print(f)", CoordinatePrint); | |
| // check a class. | |
| bool has_coordinate = AttrsGetFields("Coordinate"); | |
| // inspect all fields. | |
| AttrsField* fields = AttrsGetFields("Coordinate"); | |
| // check a field. | |
| bool has_a = AttrsHasField("Coordinate", "a"); | |
| // inspect a field. | |
| AttrsField field = AttrsGetField("Coordinate", "a"); | |
| // create a new object. | |
| AttrsRef c = AttrsCall("Coordinate:New(a, b)", 1, 2); | |
| // call a method. | |
| AttrsCall("Coordinate:Print(f)", c, AttrsBuiltin("stdout")); | |
| // call when Attrs is no longer used. | |
| AttrsDestroy(); | |
| return 0; | |
| } |
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